The present invention is related to a display assembly; more particularly, a display device comprising the display assembly.
As the demand for real-time information rises, the importance of on-demand data transmission is also increased. Near-eye displays (NED) can be easily incorporated into other devices and can transmit images, colors, texts and/or sound data at any time; therefore, it is a primary choice for portable information device or on-demand data transmission purposes. Near-eye displays are often implemented for military or governmental uses in the past. Currently, the near-eye display industry seeks expansion in the consumer sector. Meanwhile, the entertainment industry also sees the market potential in near-eye displays; for example, home entertainment system and gaming software developers have been putting effort into research and development of near-eye displays.
Currently, a typical near-eye display includes head-mounted display (HMD), which can project image directly into users' eyes. This type of display can emulate bigger displays to overcome the shortcomings of the displays in mobile devices. The head-mounted display can also be applied to virtual reality or augmented reality uses.
Near-eye displays can be further categorized into two types: immersive display and see-through display. In virtual reality (VR) environment, an immersive display can be implemented to enable composite images to completely cover the visual field of a user. In augmented reality (AR) environment, a see-through display is implemented; and therefore, texts, side notes or images can be overlapped with real images. In the field of augmented reality display technology, a transparent panel (implemented via optical or electro-optical means) is often used in a see-through display. This enables the user of the near-eye display to see both virtual images and real images in the same time.
However, since human eyes cannot focus on objects placed at a very close distance (for example, when a user is wearing glasses and using a magnify lens as a reading aid, a distance within the range of the magnify lens and the glasses is considered “close distance”); therefore, the near-eye display needs to be calibrated and adjusted to avoid image being out of focus so as to provide a comfortable using experience for the users. The traditional near-eye displays rely on complex and heavy optical assembly to adjust the focus of the image; however, since near-eye display is usually worn on the user's head, heavier near-eye displays oftentimes cannot be accepted by the users.
To overcome the above mentioned shortcomings, if one can enable at least two light beams emitted by at least two separate pixels to intersect and focus to produce a clear image; heavy optical assembly would no longer be necessary; furthermore, the manufacturing cost arisen from the optical assembly would be eliminated.
The purpose of the present invention is to provide an advantageous display assembly for a near-eye display for manufacturing a see-through display device.
In order to achieve the aforementioned purpose, the present invention provides a display assembly comprising a substrate; a plurality of light emitting units; and a transistor unit and a capacitor unit corresponding to each of the light emitting units. Each of the light emitting units and the corresponding transistor unit and capacitor unit are independently provided on a side of the substrate. And each of the light emitting units is electrically coupled to the corresponding transistor unit and the capacitor unit. A spacing between each of the light emitting units is at least two times of a first threshold length.
The phrase “independently provided” used in the present invention means the plurality of light emitting units only comprises the light emitting body, but not other parts that would block the light emitting body, such as transistors, or capacitors . . . etc.
The display assembly in the prior art is an assembly comprised of pixels. The pixels may respectively comprise a light emitting body, a transistor, a capacitor . . . etc. The transistor and the capacitor may partially block the light emitting body, causing the light emission efficiency to decrease. Based on this reason, the light emitting units in the present invention are independently provided. Relative to the prior art, the light emitting units of the present invention have greater light emission efficiency compare to the light emission body of the prior art having the same area. As a result, the area of the light emitting units can be decreased relative to the prior art.
In some embodiments of the present invention, each of the light emitting units in the display assembly comprises a red light emitter, a green light emitter, and a blue light emitter, respectively. In some embodiments of the present invention, the light emitting units in the display assembly comprise one or more light emitting body subunits, respectively; and each of the light emitting body subunits comprises a red light emitting body, a green light emitting body, and a blue light emitting body.
In some embodiments of the present invention, the light emitting units in the display assembly comprise 1 to 6 light emitting body subunits. In some embodiments of the present invention, the light emitting units in the display assembly comprise 2 to 4 light emitting body subunits.
In some embodiments of the present invention, the area of each of the light emitting units in the display assembly is smaller than that of the pixel in the prior art (the smallest is 6.3×6.3 μm2); the area difference is at least two times or dozens of times. In some embodiments of the present invention, the area of each of the light emitting body subunits in the display assembly is smaller than 1×1 μm2.
In some embodiments of the present invention, the spacing between each of the light emitting units in the display assembly is 2 to 1000 times of the first threshold length. In some embodiments of the present invention, the spacing between each of the light emitting units in the display assembly is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 25, 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 900, or 1000 times of the first threshold length.
In some embodiments of the present invention, any one of the light emitting units in the display assembly has a shape of a rectangle, the rectangle has a first side and a second side; the first side is smaller than or equal to the second side, and the first threshold length is equal to the length of the first side.
In some embodiments of the present invention, any one of the light emitting units in the display assembly has a shape of a circle; the circle has a diameter, and the first threshold length is equal to the diameter.
In some embodiments of the present invention, any one of the light emitting units in the display assembly has a shape of a polygon; the polygon has a symmetry axis, and the first threshold length is equal to the length of the symmetry axis. In some embodiments of the present invention, the polygon is a regular polygon. In some embodiments of the present invention, the regular polygon is a regular hexagon.
In some embodiments of the present invention, any one of the light emitting units in the display assembly has a shape of a rectangle, a circle and/or a polygon, the rectangle has a first side and a second side, and the first side is smaller than or equal to the second side; the circle has a diameter; the polygon has a symmetry axis; the first threshold length is equal to the shortest of the length of the first side, the diameter, and the symmetry axis.
In some embodiments of the present invention, the substrate is a transparent substrate. In some embodiments of the present invention, the transparent substrate is a glass substrate.
In some embodiments of the present invention, the transistor unit in the display assembly is a thin film transistor.
In some embodiments of the present invention, the electrical connection is a metal connection. In some embodiments of the present invention, the metal connection is a conducting connection.
In some embodiments of the present invention, the display assembly is a self-luminous display assembly; in some embodiments of the present invention, the self-luminous display assembly comprises active light sources such as organic light emitting diodes (OLED), micro light emitting diodes (micro LED), quantum dot light emitter, or laser active light sources.
In some embodiments of the present invention, the transistor unit in the display assembly is provided between the light emitting units and the substrate. In some embodiments of the present invention, the transistor unit in the display assembly and the corresponding light emitting units are on a same plane.
In some embodiments of the present invention, the display assembly further comprises one or more sensors.
The present invention further provides a display device; in addition to the display assembly, the display device further comprises a collimating assembly; the collimating assembly comprises one or more collimating units. Any one of the collimating units has a shape of a circle which has a diameter. The diameter is at least two times of a second threshold length; the spacing between each of the collimating units is at least 400 nm.
In some embodiments of the present invention, each of the diameter of the collimating units in the collimating assembly is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 50, 100, 150, or 200 times of the second threshold length.
In some embodiments of the present invention, any one of the light emitting units in the display device has a shape of a rectangle, the rectangle has a first side and a second side; the first side is smaller than or equal to the second side, and the second threshold length is equal to the length of the first side.
In some embodiments of the present invention, any one of the light emitting units in the display device has a shape of a circle; the circle has a diameter, and the second threshold length is equal to the diameter.
In some embodiments of the present invention, any one of the light emitting units in the display device has a shape of a polygon; the polygon has a symmetry axis, and the second threshold length is equal to the length of the symmetry axis. In some embodiments of the present invention, the polygon is a regular polygon. In some embodiments of the present invention, the regular polygon is a regular hexagon.
In some embodiments of the present invention, the transistor unit in the display device is a thin film transistor.
In some embodiments of the present invention, the display assembly in the display device is a self-luminous display assembly; in some embodiments of the present invention, the self-luminous display assembly comprises an active light source such as organic light emitting diode (OLED), micro light emitting diode (micro LED), quantum dot light emitter, or laser active light source.
In some embodiments of the present invention, the collimating assembly in the display device is further capable of adjusting a direction of the collimating light.
In some embodiments of the present invention, any one of the collimating units in the display device is a lens or a liquid crystal spatial light modulator (LCSLM). In some embodiments of the present invention, the lens is a microlens or a flat metalens. In some embodiments of the present invention, the lens is a concave lens or a convex lens.
In some embodiments of the present invention, the microlens serves the function of collimating the direction of the emitted light from the at least one light emitting unit in the display assembly; and re-directing the at least two collimated light beams to intersect with each other and create a focus.
In some embodiments of the present invention, the flat metalens is a metasurface having nanometer scaled bumps which have the function of refracting light and changing the direction of the collimated light. As a result, the flat metalens has a function equivalent to a diopter and a function of collimating light. The flat metalens comprises multiple areas containing bumps to enable two collimated light beams to intersect and focus. In some embodiments of the present invention, the flat metalens comprises two separate areas having bumps to enable two collimated light beams to intersect at different locations, and thus creating image having multiple depths of field. In some embodiments of the present invention, the flat metalens enables at least two collimated light beams to intersect at different locations, and thus creating image having multiple depths of field by using a same or a different area having bumps.
In some embodiments of the present invention, the liquid crystal spatial light modulator comprises a plurality of liquid crystal cells; an alignment of a liquid crystal within the liquid crystal cells can be modulated by changing the applied voltage to the liquid crystal cells, such that the light emitting by each of the light emitting units is collimated and re-directed in a way that at least two collimated light beams can intersect with each other and create a focus. In some embodiments of the present invention, the liquid crystal spatial light modulator can alter the driving voltage of at least two liquid crystal cells, enabling at least two collimated light beams passing through the at least two liquid crystal cells to intersect with another light beam at different locations, and creating image having multiple depths of field. In some embodiments of the present invention, the liquid crystal spatial light modulator can alter a driving voltage of at least a different liquid crystal cell such that at least two collimated light beams can intersect at different locations thus creating image having multiple depths of field.
In some embodiments of the present invention, the collimating units in the display device have a curve surface. In some embodiments of the present invention, the curve surface in the display device is a spherical surface or an aspherical surface.
In some embodiments of the present invention, the curve surface of the collimating units in the display device is a portion of a spherical surface. The aforementioned spherical surface has a diameter 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19, or 20 times of the length of any one of the light emitting units. In some embodiments of the present invention, the aforementioned diameter of the spherical surface is 10 times of a length of any one of the light emitting units.
In some embodiments of the present invention, the display device is a transparent display or non-transparent display.
In some embodiments of the present invention, the display device is a near-eye display. In some embodiments of the present invention, the display device is a near-eye display capable of producing image having multiple depths of field. The display device can project a light on the collimating assembly via the light emitting units on the self-luminous display assembly, so the light passing through the collimating assembly can be collimated to form a collimated light. And the direction of the collimated lights from at least two light emitting units can be altered so they can intersect at different locations; and an image having multiple depths of field can be created.
In accordance with the prevent invention, the following technical effects can be achieved:
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
Number | Date | Country | Kind |
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PCT/CN2018/077715 | Mar 2018 | CN | national |
This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). PCT/CN2018/077715 on Mar. 1, 2018, the entire contents of which are hereby incorporated by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/076752 | 3/1/2019 | WO | 00 |